It show your printer's ink absorver is almost full. So try to solve by using the following methods.
Here's How to solve Canon IP2770 Error 5200:
1. The printer is turned off and plugged the power cord.
2. Press Resume button 2 seconds
then press the POWER button until the green light on (when pressing the POWER button, Resume button ... jgn released first)
3. Then release the RESUME button, but do not release the POWER button.
4. While the POWER button is still depressed, press the Resume button 5 times. Led will light turns green orange with the last glow orange. (Do not be mistaken 4x because the printer will die completely, but it is temporary too) Then ...
5. Release both buttons simultaneously.
6. Led will blink briefly and then will glow GREEN.
7. And the computer will detect new hardware, just ignore ...
8. Press the POWER button, then the printer will die.
9. Press the POWER button again then the printer will flash and ... IP2770 Printer is ready for use thanks